Results 141 to 150 of about 143,859 (319)

Characterization of the permeability evolution of hard and soft rocks under hydro‐mechanical coupling conditions

open access: yesDeep Underground Science and Engineering, EarlyView.
The permeability variation of rocks during complete stress–strain processes was investigated. A mathematical model describing the influence of rock damage on permeability was constructed. The permeability–stress relationship between soft rock and hard rock was proposed.
Zhen Huang   +6 more
wiley   +1 more source

Field investigation of grout propagation within a caving mass under flowing water conditions in a metal mine

open access: yesDeep Underground Science and Engineering, EarlyView.
This study investigated the characteristics of two‐liquid slurry propagation filling of underground concealed spaces under flowing water conditions in metal mines using on‐site engineering tests. We proposed four different grout stratigraphic classifications, investigated four main factors affecting grout propagation, and summarized five different ...
Baofu Wu   +5 more
wiley   +1 more source

Data‐driven analysis of the spatial dependence of grouting efficiency during tunnel excavation

open access: yesDeep Underground Science and Engineering, EarlyView.
Prediction of grouting efficiency using machine learning is enhanced by adopting a training strategy that accounts for the grouting process across multiple rounds. Abstract Grouting with water–cement mixtures is the most widely used and cost‐effective method for managing excess water inflow during tunnel construction.
Huaxin Liu, Xunchang Fei, Wei Wu
wiley   +1 more source

The p-Laplacian: phenomenological modelling of the flow in porous media and CFD simulations [PDF]

open access: yesarXiv
The aim of this paper is to discuss several aspects of connections between the p-Laplacian and mathematical models in hydrology. At first we present models of groundwater flow in phreatic aquifers and models of irrigation and drainage that lead to quasilinear parabolic equations involving the p-Laplacian.
arxiv  

Local development organisations in Saharan regions of North Africa: Expanding horizons

open access: yesJournal of International Development, Volume 35, Issue 1, Page 79-96, January 2023., 2023
Abstract Local development organisations are now widespread in rural regions of North Africa. In the past, these organisations were usually only involved in a few sector‐specific activities. This study investigated the activities of 24 local development organisations in the Saharan regions of Morocco, Algeria and Tunisia.
Meriem Farah Hamamouche   +7 more
wiley   +1 more source

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